I use NewsRob. It requires you to make a Google reader account, which it syncs with, BUT it stores content offline once downloaded/synced. The depth of the downloaded feed can be changed per feed, either just text, text and pics, or up to the condensed and full webpage (the click-through page). I also augment the RSS feeds by using http://www.wizardrss.com/ which converts summary feed entries into full articles (by giving you a new RSS URL to use in the place of the original), though reliability varies by site.